Pulverized coal injection device with uniform feeding function

Abstract

The utility model relates to the technical field of pulverized coal injection, in particular to a pulverized coal injection device with a uniform feeding function. According to the technical scheme, the device comprises an injection tank, a coal feeding barrel is fixed to the bottom of the injection tank, and a discharging pipe is fixed to the bottom of the coal feeding barrel; a disc is fixed in the coal feeding barrel, a cylindrical rod is rotatably mounted on the disc, a plurality of rectangular holes which are annularly and uniformly distributed are formed in the disc, a push plate which is in contact with the disc is fixed on the curved surface of the cylindrical rod, a baffle disc which is positioned at the bottom of the disc is fixedly arranged on the cylindrical rod in a sleeving manner, and a discharging hole is formed in the baffle disc. According to the anti-blocking pulverized coal feeding device, uniform pulverized coal feeding is achieved, anti-blocking measures are arranged, smooth coal feeding is guaranteed, the good anti-blocking effect is achieved, the use quality is high, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverized coal injection, in particular to a pulverized coal injection device with uniform feeding. Background Technique

[0002] At present, most smelters adopt the following coal feeding system, including main equipment and components such as coal feeders, screw coal feeders, pulse bag dust collectors, and balance air ducts. The pulverized coal required for smelting in the fuming furnace is pneumatically transported from the pulverized coal preparation workshop to the pulverized coal bin. When adding coal, the pulverized coal in the pulverized coal bin passes through the screw coal feeder, and then is mixed with primary air and sent into the nozzle through a pipeline. It is further mixed with secondary air in the nozzle and then blown into the fuming furnace. The pulse bag dust collector is used to collect the dust generated during pneumatic transportation and balance the internal pressure of the system. The coal feeding bin in this set of coal feeding system can store the pulverized coal amount for 3 - 4 hours, and is equipped with a stirring device to prevent the pulverized coal from arching. In addition, there is an instrument control to control the appropriate amount of pulverized coal entering the coal feeding bin (not too much or too little) through a valve, and the torque of the screw feeder is adjusted by frequency conversion speed regulation, so as to control and adjust the amount of pulverized coal sent to the fuming furnace and the ratio of pulverized coal to primary air at any time, so as to meet the production requirements of the fuming furnace. This set of system is stable, safe and reliable, and has been used in some large and medium-sized smelters before.

[0003] However, there are the following problems with this set of coal feeding system. The coal feeding of the screw coal feeder is uneven. The screw coal feeder is also called a auger coal feeder. It is driven by a motor through a reducer to drive the screw rod to rotate. The screw rod is equipped with spiral blades. The pulverized coal falls into the auger from the coal dropping pipe, and the pulverized coal is sent to the tail of the screw by the rotation of the screw rod and then mixed with the primary air. The rotation speed of the screw rod can be controlled by a frequency conversion speed regulation motor, so as to adjust the amount of pulverized coal transported. However, this method is also prone to the situation of coal running. For example, when the coal feeding amount is large, coal running is likely to occur when the balance air pressure in the coal hopper is too large or the primary air volume is too small, resulting in uneven coal feeding. Therefore, this application proposes a pulverized coal injection device with uniform feeding. Summary of the Invention

[0004] The purpose of the utility model is to propose a pulverized coal injection device with uniform feeding for the problem of uneven coal feeding in the background technique.

[0005] The technical solution of the utility model: A pulverized coal injection device with uniform feeding, including a blowing tank, a coal feeding cylinder is fixed at the bottom of the blowing tank, and a plurality of discharge pipes uniformly distributed in a ring are fixed at the bottom of the coal feeding cylinder;

[0006] A disc is fixed in the coal feeding cylinder, a cylindrical rod is rotatably installed on the disc, a plurality of rectangular holes uniformly distributed in a ring are opened on the disc, a push plate in contact with the disc is fixed on the curved surface of the cylindrical rod, a retaining disc located at the bottom of the disc is fixedly sleeved on the cylindrical rod, and a discharge hole is opened on the retaining disc.

[0007] Optionally, an anti-blocking mechanism for dredging the rectangular hole is provided on the pushing plate. The anti-blocking mechanism includes a connecting rod slidably mounted on the pushing plate and lifting along the length direction of the cylindrical rod. One end of the connecting rod is connected to a cross bar, and a plurality of thin rods are fixed to the bottom of the cross bar.

[0008] Optionally, the pushing plate is arranged in a cavity structure. An electric telescopic rod is fixedly installed in the pushing plate. One end of the connecting rod away from the cross bar extends into the pushing plate and is fixedly connected to the piston rod of the electric telescopic rod.

[0009] Optionally, an installation hole is formed in the top of the pushing plate, and a sealing ring is fixed in the installation hole. The connecting rod is in sliding contact connection with the inner ring of the sealing ring.

[0010] Optionally, the thin rods are located directly above the discharge holes.

[0011] Optionally, the cross-sectional shapes of the rectangular hole and the discharge hole are the same.

[0012] Optionally, a servo motor is fixedly installed at the bottom of the coal feeding cylinder, and the output shaft of the servo motor is fixedly connected to the cylindrical rod.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] The pulverized coal on the disc is pushed by the pushing plate to move into the rectangular hole. When the baffle plate rotates to drive the discharge hole to move in a circular motion and coincide with the rectangular hole, the pulverized coal is discharged through the rectangular hole and the discharge hole and conveyed away through the discharge pipe. The rotational design of multiple uniformly distributed rectangular holes and discharge holes realizes uniform discharge of pulverized coal and uniform coal feeding.

[0015] Furthermore, when the thin rods descend, the materials above the rectangular hole are pressed down, so as to realize the extrusion of the pulverized coal in the rectangular hole and the discharge hole, effectively avoiding the blockage of the pulverized coal in the rectangular hole and the discharge hole, ensuring the smooth progress of coal feeding, and playing a very good anti-blocking role.

[0016] The utility model realizes uniform coal feeding of pulverized coal, sets anti-blocking measures, ensures the smooth progress of coal feeding, plays a very good anti-blocking role, has high use quality and is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a pulverized coal injection device for uniform feeding;

[0018] Figure 2 It is a schematic diagram of the internal structure of the coal feeding cylinder Figure 1 ;

[0019] Figure 3 It is a schematic diagram of the internal structure of the coal feeding cylinder Figure 2 ;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of the push plate.

[0021] Reference numerals: 1, injection tank; 2, coal feeding cylinder; 3, discharge pipe; 4, servo motor; 5, disc; 6, cylindrical rod; 7, rectangular hole; 8, push plate; 9, retaining disc; 10, discharge hole; 11, connecting rod; 12, cross bar; 13, thin rod; 14, electric telescopic rod. Specific embodiments

[0022] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but merely represents the selected embodiments of the present invention.

[0024] Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Embodiment 1

[0029] As Figure 1 shown, a pulverized coal injection device for uniform feeding proposed by the present utility model includes a blowing tank 1. A coal feeding cylinder 2 is fixed at the bottom of the blowing tank 1. The top of the coal feeding cylinder 2 is communicated with the blowing tank 1. The bottom of the coal feeding cylinder 2 is provided with a sealed structure. A plurality of discharging pipes 3 evenly distributed in a ring are fixed at the bottom of the coal feeding cylinder 2. Pulverized coal is transported out through the discharging pipes 3 from the coal feeding cylinder 2.

[0030] As Figure 1-2 shown, a disk 5 is fixed inside the coal feeding cylinder 2. The pulverized coal in the blowing tank 1 falls onto the disk 5. A cylindrical rod 6 is rotatably installed on the disk 5. A servo motor 4 is fixedly installed at the bottom of the coal feeding cylinder 2. The output shaft of the servo motor 4 is fixedly connected to the cylindrical rod 6. By starting the servo motor 4, the cylindrical rod 6 is driven to rotate.

[0031] As Figure 1-3 shown, a plurality of rectangular holes 7 evenly distributed in a ring are formed in the disk 5. A pushing plate 8 in contact with the disk 5 is fixed on the curved surface of the cylindrical rod 6. A retaining disk 9 located at the bottom of the disk 5 is fixedly sleeved on the cylindrical rod 6. A discharging hole 10 is formed in the retaining disk 9. The cross-sectional shapes of the rectangular holes 7 and the discharging hole 10 are the same. By rotating the cylindrical rod 6, the pushing plate 8 and the retaining disk 9 are driven to rotate. The pushing plate 8 pushes the pulverized coal on the disk 5 to move into the rectangular holes 7. When the retaining disk 9 rotates to drive the circumferential movement of the discharging hole 10 to coincide with the rectangular holes 7, the pulverized coal is discharged through the rectangular holes 7 and the discharging hole 10 and transported away through the discharging pipes 3. The rotational design of the plurality of evenly distributed rectangular holes 7 and discharging holes 10 realizes the uniform dispersion of the pulverized coal during discharging, thereby realizing uniform coal feeding.

[0032] Embodiment 2

[0033] As Figure 2-4As shown in the figure, on the basis of Embodiment 1, a clogging prevention mechanism for dredging the rectangular hole 7 is provided on the push plate 8. The clogging prevention mechanism includes a connecting rod 11 slidably mounted on the push plate 8 and rising and falling along the length direction of the cylindrical rod 6. The push plate 8 is arranged in a cavity structure. An electric telescopic rod 14 is fixedly installed in the push plate 8. One end of the connecting rod 11 away from the cross bar 12 extends into the push plate 8 and is fixedly connected to the piston rod of the electric telescopic rod 14. By starting the electric telescopic rod 14, the connecting rod 11 is driven to move up and down. One end of the connecting rod 11 is connected with a cross bar 12, and a plurality of thin rods 13 are fixed to the bottom of the cross bar 12. The thin rods 13 are located directly above the discharge hole 10. By starting the electric telescopic rod 14 to drive the connecting rod 11 to move up and down, since the thin rods 13 are located directly above the discharge hole 10, when the discharge hole 10 is docked with the rectangular hole 7, the thin rods 13 move up and down. When the thin rods 13 move down, the materials above the rectangular hole 7 are pressed down, so as to realize the pulverized coal extrusion of the rectangular hole 7 and the discharge hole 10, effectively avoiding the pulverized coal from blocking in the rectangular hole 7 and the discharge hole 10, ensuring the smooth progress of coal feeding, and playing a very good role in preventing clogging.

[0034] Among them, an installation hole is opened at the top of the push plate 8, and a sealing ring is fixed in the installation hole. The connecting rod 11 is in sliding contact connection with the inner ring of the sealing ring. The sealing ring ensures the sealing performance and avoids the pulverized coal from entering the push plate 8.

[0035] Working raw materials: The pulverized coal in the injection tank 1 falls onto the disc 5. By starting the servo motor 4 to drive the cylindrical rod 6 to rotate, through the rotation of the cylindrical rod 6, the push plate 8 and the baffle 9 are driven to rotate along the axis of the cylindrical rod 6. The push plate 8 pushes the pulverized coal on the disc 5 to move into the rectangular hole 7. When the baffle 9 rotates to drive the discharge hole 10 to move in a circular motion and coincide with the rectangular hole 7, the pulverized coal is discharged through the rectangular hole 7 and the discharge hole 10 and is transported away through the discharge pipe 3. The rotational design of multiple uniformly distributed rectangular holes 7 and discharge holes 10 realizes the uniform discharge of pulverized coal and the uniform coal feeding.

[0036] Furthermore, while the push plate 8 is rotating, start the electric telescopic rod 14 to drive the connecting rod 11 to move up and down. Since the thin rods 13 are located directly above the discharge hole 10, when the discharge hole 10 is docked with the rectangular hole 7, the thin rods 13 move up and down. When the thin rods 13 move down, the materials above the rectangular hole 7 are pressed down, so as to realize the pulverized coal extrusion of the rectangular hole 7 and the discharge hole 10, effectively avoiding the pulverized coal from blocking in the rectangular hole 7 and the discharge hole 10, ensuring the smooth progress of coal feeding, and playing a very good role in preventing clogging.

[0037] The above specific embodiments are only several alternative embodiments of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A pulverized coal injection device with uniform feeding, comprising a blowing tank (1), characterized in that: A coal feeding cylinder (2) is fixed to the bottom of the injection tank (1), and a plurality of discharge pipes (3) evenly distributed in a ring shape are fixed to the bottom of the coal feeding cylinder (2); A disc (5) is fixed in the coal feeding cylinder (2), a cylindrical rod (6) is rotatably installed on the disc (5), a plurality of rectangular holes (7) evenly distributed in a ring shape are formed in the disc (5), a push plate (8) in contact with the disc (5) is fixed to the curved surface of the cylindrical rod (6), a retaining disc (9) located at the bottom of the disc (5) is fixedly sleeved on the cylindrical rod (6), and a discharge hole (10) is formed in the retaining disc (9).

2. The pulverized coal injection device with uniform feeding according to claim 1, characterized in that An anti-blocking mechanism for dredging the rectangular holes (7) is arranged on the push plate (8). The anti-blocking mechanism includes a connecting rod (11) slidably installed on the push plate (8) and lifting along the length direction of the cylindrical rod (6). One end of the connecting rod (11) is connected with a cross bar (12), and a plurality of thin rods (13) are fixed to the bottom of the cross bar (12).

3. The pulverized coal injection device for uniform feeding according to claim 2, wherein The push plate (8) is arranged in a cavity structure, an electric telescopic rod (14) is fixedly installed in the push plate (8), and one end of the connecting rod (11) far away from the cross bar (12) extends into the push plate (8) and is fixedly connected with the piston rod of the electric telescopic rod (14).

4. A pulverized coal injection device for uniform feeding according to claim 3, characterized in that, An installation hole is formed in the top of the push plate (8), a sealing ring is fixed in the installation hole, and the connecting rod (11) is in sliding contact connection with the inner ring of the sealing ring.

5. A pulverized coal injection device with uniform feeding according to claim 2, characterized in that, The thin rod (13) is located directly above the discharge hole (10).

6. The pulverized coal injection device with uniform feeding according to claim 1, wherein The cross-sectional shapes of the rectangular hole (7) and the discharge hole (10) are the same.

7. The pulverized coal injection device with uniform feeding according to claim 1, characterized in that A servo motor (4) is fixedly installed at the bottom of the coal feeding cylinder (2), and the output shaft of the servo motor (4) is fixedly connected with the cylindrical rod (6).

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